US20060050245A1 - Projection type video display device - Google Patents

Projection type video display device Download PDF

Info

Publication number
US20060050245A1
US20060050245A1 US10/540,544 US54054405A US2006050245A1 US 20060050245 A1 US20060050245 A1 US 20060050245A1 US 54054405 A US54054405 A US 54054405A US 2006050245 A1 US2006050245 A1 US 2006050245A1
Authority
US
United States
Prior art keywords
light
display panel
light source
solid light
projection type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US10/540,544
Other versions
US7270425B2 (en
Inventor
Kazuhiro Arai
Yasuo Funazou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Assigned to SANYO ELECTRIC CO., LTD. reassignment SANYO ELECTRIC CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARAI, KAZUHIRO, FUNAZOU, YASUO
Publication of US20060050245A1 publication Critical patent/US20060050245A1/en
Application granted granted Critical
Publication of US7270425B2 publication Critical patent/US7270425B2/en
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G02B27/0961—Lens arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/1013—Beam splitting or combining systems for splitting or combining different wavelengths for colour or multispectral image sensors, e.g. splitting an image into monochromatic image components on respective sensors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G02B27/1046—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with transmissive spatial light modulators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/12—Beam splitting or combining systems operating by refraction only
    • G02B27/123—The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/149—Beam splitting or combining systems operating by reflection only using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present invention relates to a projection type video display such as a liquid crystal projector, and the like.
  • an illuminating device used for a liquid crystal projector, and etc. is formed of a lamp such as an ultra-high pressure mercury lamp, a metal halide lamp, a xenon lamp, and etc., and a parabolic reflector that renders the irradiating light a parallel light. Furthermore, in recent years, from the viewpoint of a longer operating life, and a power-saving, and the like, it is attempted to use a light-emitting diode (LED) as a light source (see Japanese Patent Laying-open No. H10-186507).
  • LED light-emitting diode
  • the power-saving in the prior art is achieved by a low-power-consumption operating characteristic of a solid light source itself, and a further power-saving illumination device has not been realized.
  • a projection type video display of the present invention comprises a first solid light source that emits a light in red, a second solid light source that emits a light in green, a third solid light source that emits a light in blue, a display panel for receiving and modulating the lights in colors from the light sources, a means for projecting a full color image light formed of the modulated lights in colors, a light source adjustment means for adjusting an amount of emitted light of the solid light sources by controlling power supplied thereto on the basis of video signal information, and a means for controlling a driving signal to each display panel so as to correspond to an adjustment of the amount of the emitted lights in respective colors.
  • an amount of emitted light of the solid light sources is adjusted in accordance with a video signal by controlling power supplied to the solid light sources, so that the more dark videos exist, the less power is consumed.
  • it is not necessary to have high cooling capacity, and besides, it is possible to reduce power consumption for cooling.
  • Each solid light source may be formed of being provided with a plurality of solid light-emitting elements and the light source adjustment means may adjust an amount of emitted light of each solid light source by controlling the number of pieces of light emission out of the plurality of solid light-emitting elements. Or, it may be configured that each solid light source is formed of being provided with a plurality of solid light-emitting elements and the light source adjustment means adjusts the amount of emitted light of each solid light source by controlling power supplied to each solid light emitting element.
  • each solid light source is formed of being provided with a plurality of solid light-emitting elements and the light source adjustment means causes each solid light-emitting element to perform a pulse light-emission and adjusts the amount of emitted light of each solid light-emitting element by controlling a duty ratio of the pulse light-emission.
  • the amount of emitted light of the solid light sources for respective colors may be adjusted by controlling the power supplied thereto so as to obtain the highest value of respective colors in 1-frame video in a state where a value of a gradation of the display panel is the highest. This enables the power consumption to be reduced as much as possible.
  • the projection type video display may be configured that a light in white obtained by combining lights in respective colors from respective light sources is guided to a single-panel full color display panel as the display panel.
  • the projection type video display may be configured that the light in white obtained by combining lights in respective colors from respective light sources is separated and each of the lights in respective colors is respectively guided to the red color-use display panel, the green color-use display panel, and the blue color-use display panel as the display panel.
  • the projection type video display may be configured that each of the lights in respective colors is guided to the red color-use display panel, the green color-use display, and the blue color-use display panel as the light in respective colors.
  • FIG. 1 is a descriptive diagram showing an optical system and a control system of a projection type video display of an embodiment of the present invention
  • FIG. 2 shows an illuminating device in which three illuminating devices exist in one plane surface
  • a portion (a) in FIG. 2 shows a state where all LED chips are turned on
  • a portion (b) in FIG. 2 shows a state where some of the LED chips are turned off in three illuminating devices
  • FIG. 3 is a front view showing a red color-use illuminating device out of the illuminating devices shown in FIG. 1 ;
  • a portion (a) in FIG. 3 shows a state all the LED chips are turned on
  • a portion (b) in FIG. 3 shows a state where some of the LED chips 11 are turned off
  • FIG. 4 is a descriptive diagram showing a changing state of a duty ratio of a pulse light-emission during each frame period
  • FIG. 5 is a descriptive diagram of a single-panel DMD system
  • FIG. 6 is a descriptive diagram of a three-panel DMD system.
  • FIGS. 1 to 6 a projection type video display according to an embodiment of the present invention will be described referring to FIGS. 1 to 6 .
  • FIG. 1 is a diagram showing an optical system and a control system of a three-panel projection type video display.
  • This projection type video display is provided with three illuminating devices 1 R, 1 G, and 1 B (Hereinafter, a numeral “1” is used when showing not specifying each illuminating device).
  • the light source 1 R emits a light in red
  • the light source 1 G emits a light in green
  • the light source 1 B emits a light in blue.
  • the light emitted from each of the illuminating devices 1 is guided by a convex lens 2 to liquid crystal display panels 3 R, 3 G, and 3 B (Hereinafter, a numeral “3” is used when showing not specifying each liquid crystal panel).
  • Each liquid crystal display panel 3 is formed of being provided with an incidence-side polarizing plate, a panel portion formed by sealing a liquid crystal between a pair of glass plates (in which a dot electrode and an alignment film are formed), and an emission-side polarizing plate.
  • Modulated lights image lights in respective colors modulated by passing through the liquid crystal display panels 3 R, 3 G, and 3 B are combined by a dichroic prism 4 , and rendered color image light.
  • the color image light is projected by a projection lens 5 , and is displayed on a screen.
  • the illuminating device 1 is formed of a light source 12 in which LED chips 11 are arranged in an array shape and lens cells 14 are arranged on a light-emission side of each of the LED chips 11 , and a pair of fly's eye lenses 13 that integrates and guides to the liquid crystal panel 3 the light emitted from each of the LED chips 11 and rendered parallel by the lens cells 14 .
  • the pair of fly's eye lenses 13 is structured of a pair of lens clusters 13 a, 13 b, and each pair of lenses guides the light emitted from each LED chip 11 to an entire surface of the liquid crystal display panel 3 .
  • the LED chips 11 are molded by transparent resin and as a result of this transparent resin being formed in a convex shape, the lens cells 14 are formed.
  • the LED chip 11 , the lens cell 14 , and each lens in the lens cluster 13 a are formed in a rectangular shape, and further, an aspect ratio of the rectangular is coincident or approximately coincident with an aspect ratio of the liquid crystal display panel 3 . It is noted that the aspect ratios of the LED chip 11 , the lens cell 14 , and each lens in the lens cluster 13 a may be rendered different from the aspect ratio of the liquid crystal display panel 3 . In this case, it is preferable that an aspect ratio of light flux guided to the liquid crystal panel 3 is rendered coincident or approximately coincident with the aspect ratio of the liquid crystal panel 3 by using an anamorphic lens.
  • An optimal processing portion 21 inputs a video signal (RGB signals) and analyzes a 1-frame video in the video signal. Specifically, the optimal processing portion detects intensity of red color (red color gradation signal), intensity of green color (green color gradation signal), and intensity of blue color (blue color gradation signal) of respective dots forming 1-frame video.
  • red color gradation signal intensity of red color
  • green color gradation signal intensity of green color
  • blue color blue color
  • the optimal processing portion 21 applies to a light source gain adjustment portion 22 a control signal for rendering a gain of the illuminating device 1 R 0 percent (minimum amount of light).
  • the light source gain adjustment portion 22 receives the control signal and controls a power (voltage) to be supplied to the illuminating device 1 R.
  • the optimal processing portion 21 applies to an LCD signal processing portion 23 a driving instruction for rendering the amount of light transmission 0 percent, for example, with regard to all dots of the liquid crystal display panel 3 R.
  • the LCD signal processing portion 23 drives the dots of the liquid crystal display panel 3 R on the basis of the driving instruction.
  • the amount of light transmission is 100 percent
  • the amount of emitted light is 50 percent.
  • a correction corresponding to the amount of emitted light of the illuminating device 1 R being rendered 50 percent may be applied to the original intensity of red color according to the video signal.
  • the amount of emitted light of the solid light sources for respective colors may be adjusted according to a power supply control such that the highest value of respective colors in the 1-frame video is obtained in a state where a value of a gradation of the display panel is the highest.
  • a power supply control such that the highest value of respective colors in the 1-frame video is obtained in a state where a value of a gradation of the display panel is the highest.
  • the control enables a least amount of power to be consumed in the illuminating device 1 .
  • the present invention is not limited to such the control, and as for the dots of which value of the intensity of red color is 50 percent, such a control as to render the amount of light transmission 70 percent and to render the amount of the emitted light of the illuminating device 1 R 70 percent may be performed.
  • a correction corresponding to the amount of emitted light of the illuminating device 1 R being rendered 70 percent may be applied to the original intensity of red color according to the video signal.
  • a conventional projection type video display receives power supply in such a manner as to emit light at a highest amount of light also in displaying black video.
  • the projection type video display according to the present invention is capable of rendering 0 (zero) the power supply to the illuminating device 1 , for example, in displaying the black video. As a result, it is possible to greatly reduce the power consumption.
  • each illuminating device 1 that is, the LED chips 11
  • the power (voltage) supplied to each illuminating device 1 is controlled by the light source gain adjustment portion 22 , and however, the amount of emitted light of each illuminating device 1 may be adjusted by controlling the number of the LED chips 11 made to emit light.
  • FIG. 2 shows the illuminating device in which three illuminating devices 1 R, 1 G, and 1 B exist. A portion (a) in FIG. 2 shows a state where all the LED chips 11 are turned on, and a portion (b) in FIG. 2 shows a state where some of the LED chips 11 are turned off in the illuminating devices 1 R, 1 G, and 1 B.
  • FIG. 3 is a front view showing the illuminating device 1 R shown in FIG. 1 . That is, the illuminating device 1 R is formed in such a manner that the LED chips 11 that emit a light in red are arranged in an array shape in one plane surface. A portion (a) in FIG.
  • FIG. 3 shows the state where all the LED chips 11 are turned on, and a portion (b) in FIG. 3 shows the state where some of the LED chips 11 are turned off.
  • the LED chips may be turned off in a dispersing fashion, but this is not always the case, and the LED chips may be turned off orderly from the LED chips located on an edge side.
  • the LED chips 11 are caused to perform a pulse light-emission, and as shown in FIG. 4 , the amount of light may be controlled by changing a duty ratio of the pulse light-emission during each frame period (1V: vertical period).
  • the configuration using the liquid crystal display panel is shown, however, the present invention is not limited to using the liquid crystal display panel. Instead, a display panel, a type in which each one of micro mirrors is driven singly (for example, a digital micro mirror device: DMD), may be used.
  • a display panel a type in which each one of micro mirrors is driven singly (for example, a digital micro mirror device: DMD)
  • DMD digital micro mirror device
  • the illuminating devices 1 R, 1 G, and 1 B are arranged in such a manner as to face respectively three of four side surfaces of the dichroic prism 4 , and a light in white is emitted from the other side surface of the dichroic prism 4 .
  • the light in white is irradiated onto a single panel DMD 9 via a lens 7 and a curved surface mirror 10 .
  • the light reflected by the single panel DMD 9 (full color image light) is projected by a projection lens 5 .
  • the illuminating devices 1 R, 1 G and 1 B are arranged in such a manner as to face respectively three of four side surfaces of the dichroic prism 4 , and the light in white is emitted from the other side surface of the dichroic prism 4 .
  • the light in white is guided to a total internal reflection (TIR) prism 30 via the lens 7 .
  • TIR total internal reflection
  • the light in white reflected by the total internal reflection prism 30 is guided to a color separation prism 31 formed of three prisms. Then, the lights in respective colors are guided to the DMDs for respective colors 9 R, 9 G, and 9 B. Reflected lights (image lights in respective colors) therefrom are incident on the color separation prism 31 again, and emitted from the color separation prism 31 after becoming a full color image light.
  • the full color image light emitted from the color separation prism 31 transmits the total internal reflection prism 30 and is projected by a projection lens 5 .
  • the configuration of the illuminating device 1 is not limited to the above-described configuration.
  • a rod integrator instead of a pair of fly's eye lenses 13 , it is possible to use a rod integrator.
  • the solid light source is not limited to the light emitting diode (LED) and it is possible to use a laser diode, and the like.
  • the optimal processing portion 21 may perform a three-level determination (dark, middle, bright) toward the input video signal and may control the amount of light and the driving of the panel under the three levels.
  • the amount of emitted light of the solid light source is adjusted in accordance with the video signal, so that the more dark videos exit, the less the power is consumed. Moreover, there are such advantages that it is not necessary to have high cooling capacity and it is possible to reduce power consumption for cooling.

Abstract

An optimal processing portion (21) inputs a video signal (RGB signals) and analyzes 1-frame video in the video signal. For example, if the intensity of red color is 0 percent in all dots in 1-frame video, the optimal processing portion (21) applies to a light source gain adjustment portion (22) a control signal for rendering a gain of the illuminating device (1R) 0 percent (minimum amount of light). The light source gain adjustment portion (22) receives the control signal and controls power supply to the illuminating device (1R). In addition, the optimal processing portion (21) applies a driving instruction for rendering the amount of light transmission 0 percent with regard to all dots of the liquid crystal display panel (3R), for example, to a LCD signal processing portion (23).

Description

    TECHNICAL FIELD
  • The present invention relates to a projection type video display such as a liquid crystal projector, and the like.
    • PRIOR ART
  • Generally, an illuminating device used for a liquid crystal projector, and etc., is formed of a lamp such as an ultra-high pressure mercury lamp, a metal halide lamp, a xenon lamp, and etc., and a parabolic reflector that renders the irradiating light a parallel light. Furthermore, in recent years, from the viewpoint of a longer operating life, and a power-saving, and the like, it is attempted to use a light-emitting diode (LED) as a light source (see Japanese Patent Laying-open No. H10-186507).
  • However, the power-saving in the prior art is achieved by a low-power-consumption operating characteristic of a solid light source itself, and a further power-saving illumination device has not been realized.
    • SUMMARY OF THE INVENTION
  • In view of the foregoing circumstances, it is an object of the present invention to provide a projection type video display capable of realizing a power-saving by using a solid light source such as a light-emitting-diode, and the like.
  • In order to solve the above-mentioned problem, a projection type video display of the present invention comprises a first solid light source that emits a light in red, a second solid light source that emits a light in green, a third solid light source that emits a light in blue, a display panel for receiving and modulating the lights in colors from the light sources, a means for projecting a full color image light formed of the modulated lights in colors, a light source adjustment means for adjusting an amount of emitted light of the solid light sources by controlling power supplied thereto on the basis of video signal information, and a means for controlling a driving signal to each display panel so as to correspond to an adjustment of the amount of the emitted lights in respective colors.
  • With the above-described configuration, an amount of emitted light of the solid light sources is adjusted in accordance with a video signal by controlling power supplied to the solid light sources, so that the more dark videos exist, the less power is consumed. In addition, it is not necessary to have high cooling capacity, and besides, it is possible to reduce power consumption for cooling.
  • Each solid light source may be formed of being provided with a plurality of solid light-emitting elements and the light source adjustment means may adjust an amount of emitted light of each solid light source by controlling the number of pieces of light emission out of the plurality of solid light-emitting elements. Or, it may be configured that each solid light source is formed of being provided with a plurality of solid light-emitting elements and the light source adjustment means adjusts the amount of emitted light of each solid light source by controlling power supplied to each solid light emitting element. Or, it may be configured that each solid light source is formed of being provided with a plurality of solid light-emitting elements and the light source adjustment means causes each solid light-emitting element to perform a pulse light-emission and adjusts the amount of emitted light of each solid light-emitting element by controlling a duty ratio of the pulse light-emission.
  • The amount of emitted light of the solid light sources for respective colors may be adjusted by controlling the power supplied thereto so as to obtain the highest value of respective colors in 1-frame video in a state where a value of a gradation of the display panel is the highest. This enables the power consumption to be reduced as much as possible.
  • The projection type video display may be configured that a light in white obtained by combining lights in respective colors from respective light sources is guided to a single-panel full color display panel as the display panel. Or, the projection type video display may be configured that the light in white obtained by combining lights in respective colors from respective light sources is separated and each of the lights in respective colors is respectively guided to the red color-use display panel, the green color-use display panel, and the blue color-use display panel as the display panel. Or, the projection type video display may be configured that each of the lights in respective colors is guided to the red color-use display panel, the green color-use display, and the blue color-use display panel as the light in respective colors.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a descriptive diagram showing an optical system and a control system of a projection type video display of an embodiment of the present invention;
  • FIG. 2 shows an illuminating device in which three illuminating devices exist in one plane surface;
  • A portion (a) in FIG. 2 shows a state where all LED chips are turned on;
  • A portion (b) in FIG. 2 shows a state where some of the LED chips are turned off in three illuminating devices;
  • FIG. 3 is a front view showing a red color-use illuminating device out of the illuminating devices shown in FIG. 1;
  • A portion (a) in FIG. 3 shows a state all the LED chips are turned on;
  • A portion (b) in FIG. 3 shows a state where some of the LED chips 11 are turned off;
  • FIG. 4 is a descriptive diagram showing a changing state of a duty ratio of a pulse light-emission during each frame period;
  • FIG. 5 is a descriptive diagram of a single-panel DMD system; and
  • FIG. 6 is a descriptive diagram of a three-panel DMD system.
    • BEST MODE FOR PRACTICING THE INVENTION
  • Hereinafter, a projection type video display according to an embodiment of the present invention will be described referring to FIGS. 1 to 6.
  • FIG. 1 is a diagram showing an optical system and a control system of a three-panel projection type video display. This projection type video display is provided with three illuminating devices 1R, 1G, and 1B (Hereinafter, a numeral “1” is used when showing not specifying each illuminating device). The light source 1R emits a light in red, the light source 1G emits a light in green, and the light source 1B emits a light in blue. The light emitted from each of the illuminating devices 1 is guided by a convex lens 2 to liquid crystal display panels 3R, 3G, and 3B (Hereinafter, a numeral “3” is used when showing not specifying each liquid crystal panel). Each liquid crystal display panel 3 is formed of being provided with an incidence-side polarizing plate, a panel portion formed by sealing a liquid crystal between a pair of glass plates (in which a dot electrode and an alignment film are formed), and an emission-side polarizing plate. Modulated lights (image lights in respective colors) modulated by passing through the liquid crystal display panels 3R, 3G, and 3B are combined by a dichroic prism 4, and rendered color image light. The color image light is projected by a projection lens 5, and is displayed on a screen.
  • The illuminating device 1 is formed of a light source 12 in which LED chips 11 are arranged in an array shape and lens cells 14 are arranged on a light-emission side of each of the LED chips 11, and a pair of fly's eye lenses 13 that integrates and guides to the liquid crystal panel 3 the light emitted from each of the LED chips 11 and rendered parallel by the lens cells 14. The pair of fly's eye lenses 13 is structured of a pair of lens clusters 13 a, 13 b, and each pair of lenses guides the light emitted from each LED chip 11 to an entire surface of the liquid crystal display panel 3. The LED chips 11 are molded by transparent resin and as a result of this transparent resin being formed in a convex shape, the lens cells 14 are formed. The LED chip 11, the lens cell 14, and each lens in the lens cluster 13 a are formed in a rectangular shape, and further, an aspect ratio of the rectangular is coincident or approximately coincident with an aspect ratio of the liquid crystal display panel 3. It is noted that the aspect ratios of the LED chip 11, the lens cell 14, and each lens in the lens cluster 13 a may be rendered different from the aspect ratio of the liquid crystal display panel 3. In this case, it is preferable that an aspect ratio of light flux guided to the liquid crystal panel 3 is rendered coincident or approximately coincident with the aspect ratio of the liquid crystal panel 3 by using an anamorphic lens.
  • An optimal processing portion 21 inputs a video signal (RGB signals) and analyzes a 1-frame video in the video signal. Specifically, the optimal processing portion detects intensity of red color (red color gradation signal), intensity of green color (green color gradation signal), and intensity of blue color (blue color gradation signal) of respective dots forming 1-frame video. Here, in order to simplify the description, it is assumed that the intensity of respective colors is normally within a range of a 256-gradation, and this range is between 0 and 100 percent, an amount of light transmission of the liquid crystal display panel 3 is controlled by a 100-gradation, and as for each illuminating device 1, too, the amount of light is adjusted by each 1 percent in a range of between 1 and 100 percent.
  • If the intensity of red color is 0 percent in all dots in the 1-frame video, the optimal processing portion 21 applies to a light source gain adjustment portion 22 a control signal for rendering a gain of the illuminating device 1R 0 percent (minimum amount of light). The light source gain adjustment portion 22 receives the control signal and controls a power (voltage) to be supplied to the illuminating device 1R. Moreover, the optimal processing portion 21 applies to an LCD signal processing portion 23 a driving instruction for rendering the amount of light transmission 0 percent, for example, with regard to all dots of the liquid crystal display panel 3R. The LCD signal processing portion 23 drives the dots of the liquid crystal display panel 3R on the basis of the driving instruction.
  • When a highest value of the intensity of red color in the 1-frame video is 50 percent, as for the dots of which value of the intensity of red color is 50 percent, the amount of light transmission is 100 percent, and as for the illuminating device 1R, the amount of emitted light is 50 percent. With regard to the dots having the value of intensity of red color other than 50 percent, a correction corresponding to the amount of emitted light of the illuminating device 1R being rendered 50 percent may be applied to the original intensity of red color according to the video signal. That is, the amount of emitted light of the solid light sources for respective colors may be adjusted according to a power supply control such that the highest value of respective colors in the 1-frame video is obtained in a state where a value of a gradation of the display panel is the highest. Such the control enables a least amount of power to be consumed in the illuminating device 1. Needless to say, the present invention is not limited to such the control, and as for the dots of which value of the intensity of red color is 50 percent, such a control as to render the amount of light transmission 70 percent and to render the amount of the emitted light of the illuminating device 1R 70 percent may be performed. In this case, too, with regard to the dots having the value of intensity of red color other than 50 percent, a correction corresponding to the amount of emitted light of the illuminating device 1R being rendered 70 percent may be applied to the original intensity of red color according to the video signal.
  • In addition, a similar control may be performed also with regard to other colors. A conventional projection type video display receives power supply in such a manner as to emit light at a highest amount of light also in displaying black video. However, the projection type video display according to the present invention is capable of rendering 0 (zero) the power supply to the illuminating device 1, for example, in displaying the black video. As a result, it is possible to greatly reduce the power consumption.
  • It is noted that, in the above-described configuration, the power (voltage) supplied to each illuminating device 1 (that is, the LED chips 11) is controlled by the light source gain adjustment portion 22, and however, the amount of emitted light of each illuminating device 1 may be adjusted by controlling the number of the LED chips 11 made to emit light. FIG. 2 shows the illuminating device in which three illuminating devices 1R, 1G, and 1B exist. A portion (a) in FIG. 2 shows a state where all the LED chips 11 are turned on, and a portion (b) in FIG. 2 shows a state where some of the LED chips 11 are turned off in the illuminating devices 1R, 1G, and 1B. The LED chips 11 that are turned off are shown by a black color in the Figure. It is noted that the lights in respective colors are superposed and emitted from such the illuminating device, so that the light may be guided to a single-panel full color display panel. Or, the light may be divided into the lights in respective colors by a dichroic mirror and guided to the display panels for respective colors. In addition, FIG. 3 is a front view showing the illuminating device 1R shown in FIG. 1. That is, the illuminating device 1R is formed in such a manner that the LED chips 11 that emit a light in red are arranged in an array shape in one plane surface. A portion (a) in FIG. 3 shows the state where all the LED chips 11 are turned on, and a portion (b) in FIG. 3 shows the state where some of the LED chips 11 are turned off. When turning off the LED chips 11, as shown in the portion (b) in FIG. 2 and the portion (b) in FIG. 3, the LED chips may be turned off in a dispersing fashion, but this is not always the case, and the LED chips may be turned off orderly from the LED chips located on an edge side.
  • Furthermore, the LED chips 11 are caused to perform a pulse light-emission, and as shown in FIG. 4, the amount of light may be controlled by changing a duty ratio of the pulse light-emission during each frame period (1V: vertical period).
  • Moreover, the configuration using the liquid crystal display panel is shown, however, the present invention is not limited to using the liquid crystal display panel. Instead, a display panel, a type in which each one of micro mirrors is driven singly (for example, a digital micro mirror device: DMD), may be used. In the case of the single-panel projection type video display, for example, as shown in FIG. 5, the illuminating devices 1R, 1G, and 1B are arranged in such a manner as to face respectively three of four side surfaces of the dichroic prism 4, and a light in white is emitted from the other side surface of the dichroic prism 4. Then, the light in white is irradiated onto a single panel DMD 9 via a lens 7 and a curved surface mirror 10. The light reflected by the single panel DMD 9 (full color image light) is projected by a projection lens 5. In addition, in the case of the three-panel projection type video display, for example, as shown in FIG. 6, the illuminating devices 1R, 1G and 1B are arranged in such a manner as to face respectively three of four side surfaces of the dichroic prism 4, and the light in white is emitted from the other side surface of the dichroic prism 4. Then the light in white is guided to a total internal reflection (TIR) prism 30 via the lens 7. The light in white reflected by the total internal reflection prism 30 is guided to a color separation prism 31 formed of three prisms. Then, the lights in respective colors are guided to the DMDs for respective colors 9R, 9G, and 9B. Reflected lights (image lights in respective colors) therefrom are incident on the color separation prism 31 again, and emitted from the color separation prism 31 after becoming a full color image light. The full color image light emitted from the color separation prism 31 transmits the total internal reflection prism 30 and is projected by a projection lens 5.
  • The configuration of the illuminating device 1 is not limited to the above-described configuration. For example, instead of a pair of fly's eye lenses 13, it is possible to use a rod integrator. Also the solid light source is not limited to the light emitting diode (LED) and it is possible to use a laser diode, and the like. In addition, the optimal processing portion 21 may perform a three-level determination (dark, middle, bright) toward the input video signal and may control the amount of light and the driving of the panel under the three levels.
  • As described above, with the present invention, the amount of emitted light of the solid light source is adjusted in accordance with the video signal, so that the more dark videos exit, the less the power is consumed. Moreover, there are such advantages that it is not necessary to have high cooling capacity and it is possible to reduce power consumption for cooling.

Claims (8)

1. A projection type video display, comprising:
a first solid light source that emits a light in red;
a second solid light source that emits a light in green;
a third solid light source that emits a light in blue;
a display panel for receiving and modulating said lights in colors from said light sources;
a means for projecting a full color image light formed of said modulated lights in colors;
a light source adjustment means for adjusting an amount of emitted light of said solid light sources by controlling power supplied thereto on the basis of video signal information; and
a means for controlling a driving signal to each display panel so as to correspond to an adjustment of the amount of the emitted lights in respective colors.
2. A projection type video display according to claim 1, wherein each solid light source is formed of being provided with a plurality of solid light-emitting elements, and said light source adjustment means controls an amount of emitted light of each solid light source by controlling the number of pieces of light emission out of the plurality of solid light-emitting elements.
3. A projection type video display according to claim 1, wherein each solid light source is formed of being provided with a plurality of solid light-emitting elements, and said light source adjustment means adjusts an amount of emitted light of each solid light source by controlling power supplied to each solid light-emitting element.
4. A projection type video display according to claim 1, wherein each solid light source is formed of being provided with a plurality of solid light-emitting elements, said light source adjustment means causes each solid light-emitting element to perform a pulse light-emission and adjusts an amount of emitted light of each solid light-emitting element by controlling a duty ratio of the pulse light-emission.
5. A projection type video display according to any one of claims 1 to 4, wherein the amount of emitted light of said solid light sources for respective colors is adjusted by controlling the power supplied thereto so as to obtain the highest value of respective colors in 1-frame video in a state where a value of a gradation of the display panel is the highest.
6. A projection type video display according to any one of claims 1 to 5, wherein a light in white obtained by combining lights in respective colors from respective light sources is guided to a single-panel full color display panel as said display panel.
7. A projection type video display according to any one of claims 1 to 5, wherein a light in white obtained by combining lights in respective colors from respective light sources is separated, and each of the lights in respective colors is guided to a red color-use display panel, a green color-use display panel, and a blue color-use display panel as said display panel, respectively.
8. A projection type video display according to any one of claims 1 to 5, wherein each of the lights in respective colors is guided to the red color-use display panel, the green color-use display panel, and the blue-color use display panel as the light in respective colors.
US10/540,544 2002-12-26 2003-12-25 Projection type video display Expired - Fee Related US7270425B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002-377873 2002-12-26
JP2002377873 2002-12-26
PCT/JP2003/016835 WO2004059608A1 (en) 2002-12-26 2003-12-25 Projection type video display device

Publications (2)

Publication Number Publication Date
US20060050245A1 true US20060050245A1 (en) 2006-03-09
US7270425B2 US7270425B2 (en) 2007-09-18

Family

ID=32677410

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/540,544 Expired - Fee Related US7270425B2 (en) 2002-12-26 2003-12-25 Projection type video display

Country Status (6)

Country Link
US (1) US7270425B2 (en)
EP (1) EP1577872A4 (en)
JP (1) JP4245563B2 (en)
KR (1) KR100816971B1 (en)
CN (1) CN100424547C (en)
WO (1) WO2004059608A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040248022A1 (en) * 2003-04-23 2004-12-09 Seiko Epson Corporation Display device and light adjusting method thereof
US20050237488A1 (en) * 2004-04-22 2005-10-27 Futoshi Yamasaki Image display apparatus
US20060158516A1 (en) * 2005-01-20 2006-07-20 Manabu Suginobu Projection-type display apparatus and multiscreen display apparatus
US20090153805A1 (en) * 2007-12-14 2009-06-18 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Portable projector with a heat dissipation system
US20090267967A1 (en) * 2006-05-24 2009-10-29 Tomoko Morita Color temperature correction device and display device
US20110176063A1 (en) * 2010-01-21 2011-07-21 Sony Corporation Displaying projector status visibly
US20110222023A1 (en) * 2008-12-05 2011-09-15 Sanyo Electric Co., Ltd. Illumination device and projection display device
US20140211173A1 (en) * 2013-01-30 2014-07-31 3M Innovative Properties Company Optical projection subsystem
US9039199B2 (en) 2012-04-26 2015-05-26 Mitsubishi Electric Corporation Projector having blue light alleviating part
EP2472315A4 (en) * 2009-08-25 2015-06-17 Mitsubishi Electric Corp Light collecting optical system and projection-type image display device
US20160131315A1 (en) * 2013-05-17 2016-05-12 Appotronics China Corporation Light-emitting device and stage lamp system
US20160282707A1 (en) * 2015-03-23 2016-09-29 Canon Kabushiki Kaisha Projection control apparatus and control method
US11099473B2 (en) * 2019-04-16 2021-08-24 Coretronic Corporation Illumination system and projection apparatus

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8071740B2 (en) 2000-11-17 2011-12-06 Vascular Biogenics Ltd. Promoters exhibiting endothelial cell specificity and methods of using same for regulation of angiogenesis
US6838452B2 (en) 2000-11-24 2005-01-04 Vascular Biogenics Ltd. Methods employing and compositions containing defined oxidized phospholipids for prevention and treatment of atherosclerosis
CA2463816C (en) 2001-10-19 2014-07-08 Vascular Biogenics Ltd. Polynucleotide constructs, pharmaceutical compositions and methods for targeted downregulation of angiogenesis and anticancer therapy
US7205960B2 (en) 2003-02-19 2007-04-17 Mirage Innovations Ltd. Chromatic planar optic display system
EP1671178A1 (en) * 2003-09-30 2006-06-21 Koninklijke Philips Electronics N.V. Light source array for lcd applications
JP4107266B2 (en) * 2004-06-11 2008-06-25 セイコーエプソン株式会社 Display device and dimming method thereof
US7499216B2 (en) 2004-07-23 2009-03-03 Mirage Innovations Ltd. Wide field-of-view binocular device
US7492512B2 (en) 2004-07-23 2009-02-17 Mirage International Ltd. Wide field-of-view binocular device, system and kit
JP4731142B2 (en) * 2004-09-16 2011-07-20 株式会社リコー Color display device, projector, and eyepiece type display device
CN101917498B (en) * 2004-09-21 2012-06-13 株式会社尼康 Mobile information device
JP4254672B2 (en) * 2004-09-21 2009-04-15 株式会社ニコン Portable information equipment
US20110310357A1 (en) * 2004-11-15 2011-12-22 Kuo-Ching Chiang Multiple rate projector
US9083781B2 (en) 2004-11-15 2015-07-14 Bascule Development Ag Llc Portable image-capturing device with embedded projector
US7874486B2 (en) 2004-11-15 2011-01-25 Kuo-Ching Chiang Portable communication device with DMD
US7178735B2 (en) * 2004-11-15 2007-02-20 Kuo Ching Chiang Multi-function portable communication device
EP1830225B1 (en) 2004-11-26 2013-12-25 Nikon Corporation Projector device
EP1834320B1 (en) * 2004-12-23 2017-08-30 Dolby Laboratories Licensing Corporation Wide color gamut displays
KR100718962B1 (en) * 2004-12-28 2007-05-16 엘지전자 주식회사 Projection Display Driving Apparatus
US7573640B2 (en) 2005-04-04 2009-08-11 Mirage Innovations Ltd. Multi-plane optical apparatus
JP2006301325A (en) * 2005-04-21 2006-11-02 Victor Co Of Japan Ltd Image display apparatus
KR101189085B1 (en) * 2005-07-14 2012-11-09 삼성디스플레이 주식회사 Backlight unit and liquid crystal display having the same
JP5320661B2 (en) * 2006-03-28 2013-10-23 セイコーエプソン株式会社 Image display device
JP5277518B2 (en) * 2006-04-21 2013-08-28 カシオ計算機株式会社 Projection apparatus, display control method, and program
WO2007138576A1 (en) * 2006-05-25 2007-12-06 Mirage Innovations Ltd. Illumination system with optical integrator for an image projector
JP2007333140A (en) * 2006-06-16 2007-12-27 Bosch Corp Electromagnetic proportional control valve for flow control and pump for fuel supply
JP4239107B2 (en) * 2006-08-25 2009-03-18 カシオ計算機株式会社 Light source device and projector
WO2008035259A1 (en) * 2006-09-20 2008-03-27 Koninklijke Philips Electronics N.V. Dynamic gamut control
DE102006045440A1 (en) * 2006-09-26 2008-03-27 Osram Opto Semiconductors Gmbh Optical projection device comprises light source provided with two light-emitting diode chips, and light source has illumination surface formed by radiation emission surfaces of light-emitting diode chips
JP5162901B2 (en) * 2007-01-05 2013-03-13 株式会社日立製作所 Projection display device and optical unit
US7468831B2 (en) * 2007-02-20 2008-12-23 Miradia, Inc. Contrast with fast response light source
US8011792B2 (en) * 2007-12-28 2011-09-06 Sanyo Electric Co., Ltd. Lighting unit and projection display apparatus
TWI376562B (en) * 2008-06-04 2012-11-11 Delta Electronics Inc Light transformation apparatus and light source apparatus comprising the same
JP2010224316A (en) * 2009-03-24 2010-10-07 Sanyo Electric Co Ltd Projection type video display
CN101988630B (en) * 2009-07-31 2013-01-09 深圳市光峰光电技术有限公司 Stage lighting system and method thereof for proving high-brightness white light
US8277049B2 (en) * 2010-02-02 2012-10-02 National Kaohsiung First University Of Science And Technology Projector using LEDs as light sources
JP5703631B2 (en) * 2010-08-26 2015-04-22 セイコーエプソン株式会社 projector
TW201229653A (en) * 2010-12-31 2012-07-16 Bascule Dev Ag Llc Transmitting color image projector and the method thereof
TWI418920B (en) * 2011-03-31 2013-12-11 Young Optics Inc Projection apparatus
TWI446002B (en) * 2011-04-29 2014-07-21 Delta Electronics Inc Light source apparatus
JP5999959B2 (en) * 2012-04-05 2016-09-28 三菱電機株式会社 Projection type projector
CN103391412B (en) * 2013-07-23 2016-06-01 华东师范大学 The method for displaying image of a kind of light-source brightness Automatic adjusument and device
CN107129931B (en) * 2017-06-27 2023-04-18 中国计量科学研究院 Biomolecule optical detector metering standard device and use method
CN111352287A (en) * 2018-12-24 2020-06-30 深圳光峰科技股份有限公司 Light source system and projection equipment
CN112596332B (en) * 2020-12-23 2022-03-11 广景视睿科技（深圳）有限公司 Projection system and projector

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5971545A (en) * 1997-06-25 1999-10-26 Hewlett-Packard Company Light source for projection display
US20020154277A1 (en) * 2001-04-02 2002-10-24 Hiroshi Mukawa Image display device
US20030025842A1 (en) * 2001-06-26 2003-02-06 Saccomanno Robert J. Projection system utilizing fiber optic illumination
US6547400B1 (en) * 1998-06-04 2003-04-15 Seiko Epson Corporation Light source device, optical device, and liquid-crystal display device
US6547421B2 (en) * 2000-05-31 2003-04-15 Sony Corporation Display apparatus
US6769772B2 (en) * 2002-10-11 2004-08-03 Eastman Kodak Company Six color display apparatus having increased color gamut
US20040207822A1 (en) * 2003-04-15 2004-10-21 Samsung Electronics Co., Ltd. Projection display
US20040227907A1 (en) * 2003-02-28 2004-11-18 Glenn William E. Displays using solid state light sources
US6834963B2 (en) * 2001-09-29 2004-12-28 Samsung Electronics Co., Ltd. Illumination system and projector adopting the same
US6882379B1 (en) * 1998-06-05 2005-04-19 Seiko Epson Corporation Light source device including a planar light source having a single, substantially continuous light emission area and display device incorporating the light source device
US6916097B2 (en) * 2003-04-18 2005-07-12 Victor Company Of Japan, Limited Light source device and projection type display unit to which the device is applied
US6918682B2 (en) * 2001-11-08 2005-07-19 Samsung Electronics Co., Ltd. Illumination system and projection system employing the same
US6932477B2 (en) * 2001-12-21 2005-08-23 Koninklijke Philips Electronics N.V. Apparatus for providing multi-spectral light for an image projection system
US6939027B2 (en) * 2002-07-09 2005-09-06 Kabushiki Kaisha Topcon Light source system
US20050200812A1 (en) * 2004-03-10 2005-09-15 Seiko Epson Corporation Illuminating apparatus, image display apparatus, and projector
US20050219464A1 (en) * 2004-03-30 2005-10-06 Hitachi, Ltd. Semiconductor light-emitting device and video display adopting it
US6975294B2 (en) * 2000-07-10 2005-12-13 Corporation For Laser Optics Research Systems and methods for speckle reduction through bandwidth enhancement
US7070281B2 (en) * 2002-12-04 2006-07-04 Nec Viewtechnology, Ltd. Light source device and projection display

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6243055B1 (en) * 1994-10-25 2001-06-05 James L. Fergason Optical display system and method with optical shifting of pixel position including conversion of pixel layout to form delta to stripe pattern by time base multiplexing
JPH10186507A (en) 1996-10-31 1998-07-14 Sanyo Electric Co Ltd Rear projection display device
TW380213B (en) * 1999-01-21 2000-01-21 Ind Tech Res Inst Illumination apparatus and image projection apparatus includes the same
JP2000214827A (en) * 1999-01-21 2000-08-04 Toray Ind Inc Color liquid crystal display device in field sequential drive system
JP2000221499A (en) * 1999-01-28 2000-08-11 Sony Corp Light source for image display device and image display device
JP4590647B2 (en) * 1999-07-30 2010-12-01 日東光学株式会社 Light source device and projector device
KR20010050623A (en) * 1999-10-04 2001-06-15 모리시타 요이찌 Display technique for high gradation degree
JP2002278505A (en) * 2001-03-19 2002-09-27 Canon Inc Image processor

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5971545A (en) * 1997-06-25 1999-10-26 Hewlett-Packard Company Light source for projection display
US6547400B1 (en) * 1998-06-04 2003-04-15 Seiko Epson Corporation Light source device, optical device, and liquid-crystal display device
US6882379B1 (en) * 1998-06-05 2005-04-19 Seiko Epson Corporation Light source device including a planar light source having a single, substantially continuous light emission area and display device incorporating the light source device
US6547421B2 (en) * 2000-05-31 2003-04-15 Sony Corporation Display apparatus
US6975294B2 (en) * 2000-07-10 2005-12-13 Corporation For Laser Optics Research Systems and methods for speckle reduction through bandwidth enhancement
US20020154277A1 (en) * 2001-04-02 2002-10-24 Hiroshi Mukawa Image display device
US20030025842A1 (en) * 2001-06-26 2003-02-06 Saccomanno Robert J. Projection system utilizing fiber optic illumination
US6834963B2 (en) * 2001-09-29 2004-12-28 Samsung Electronics Co., Ltd. Illumination system and projector adopting the same
US6918682B2 (en) * 2001-11-08 2005-07-19 Samsung Electronics Co., Ltd. Illumination system and projection system employing the same
US6932477B2 (en) * 2001-12-21 2005-08-23 Koninklijke Philips Electronics N.V. Apparatus for providing multi-spectral light for an image projection system
US6939027B2 (en) * 2002-07-09 2005-09-06 Kabushiki Kaisha Topcon Light source system
US6769772B2 (en) * 2002-10-11 2004-08-03 Eastman Kodak Company Six color display apparatus having increased color gamut
US7070281B2 (en) * 2002-12-04 2006-07-04 Nec Viewtechnology, Ltd. Light source device and projection display
US20040227907A1 (en) * 2003-02-28 2004-11-18 Glenn William E. Displays using solid state light sources
US20040207822A1 (en) * 2003-04-15 2004-10-21 Samsung Electronics Co., Ltd. Projection display
US6916097B2 (en) * 2003-04-18 2005-07-12 Victor Company Of Japan, Limited Light source device and projection type display unit to which the device is applied
US20050200812A1 (en) * 2004-03-10 2005-09-15 Seiko Epson Corporation Illuminating apparatus, image display apparatus, and projector
US20050219464A1 (en) * 2004-03-30 2005-10-06 Hitachi, Ltd. Semiconductor light-emitting device and video display adopting it

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040248022A1 (en) * 2003-04-23 2004-12-09 Seiko Epson Corporation Display device and light adjusting method thereof
US7639220B2 (en) * 2003-04-23 2009-12-29 Seiko Epson Corporation Display device and light adjusting method thereof
US20100060556A1 (en) * 2003-04-23 2010-03-11 Seiko Epson Corporation Display Device and Light Adjusting Method Thereof
US20050237488A1 (en) * 2004-04-22 2005-10-27 Futoshi Yamasaki Image display apparatus
US7410264B2 (en) * 2004-04-22 2008-08-12 Hitachi, Ltd. Image display apparatus forming optical image by irradiating light from light source onto image display element
US20060158516A1 (en) * 2005-01-20 2006-07-20 Manabu Suginobu Projection-type display apparatus and multiscreen display apparatus
US7543944B2 (en) * 2005-01-20 2009-06-09 Hitachi. Ltd. Projection-type display apparatus and multiscreen display apparatus
US20090267967A1 (en) * 2006-05-24 2009-10-29 Tomoko Morita Color temperature correction device and display device
US8144172B2 (en) * 2006-05-24 2012-03-27 Panasonic Corporation Color temperature correction device and display device
US20090153805A1 (en) * 2007-12-14 2009-06-18 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Portable projector with a heat dissipation system
US20110222023A1 (en) * 2008-12-05 2011-09-15 Sanyo Electric Co., Ltd. Illumination device and projection display device
EP2472315A4 (en) * 2009-08-25 2015-06-17 Mitsubishi Electric Corp Light collecting optical system and projection-type image display device
US20110176063A1 (en) * 2010-01-21 2011-07-21 Sony Corporation Displaying projector status visibly
US8714750B2 (en) * 2010-01-21 2014-05-06 Sony Corporation Displaying projector status visibly
US9039199B2 (en) 2012-04-26 2015-05-26 Mitsubishi Electric Corporation Projector having blue light alleviating part
US20140211173A1 (en) * 2013-01-30 2014-07-31 3M Innovative Properties Company Optical projection subsystem
US20160131315A1 (en) * 2013-05-17 2016-05-12 Appotronics China Corporation Light-emitting device and stage lamp system
US10125927B2 (en) * 2013-05-17 2018-11-13 Appotronics China Corporation Light-emitting device and stage lamp system
US20160282707A1 (en) * 2015-03-23 2016-09-29 Canon Kabushiki Kaisha Projection control apparatus and control method
US11099473B2 (en) * 2019-04-16 2021-08-24 Coretronic Corporation Illumination system and projection apparatus

Also Published As

Publication number Publication date
JP4245563B2 (en) 2009-03-25
KR20050088218A (en) 2005-09-02
CN1729502A (en) 2006-02-01
EP1577872A4 (en) 2008-11-26
CN100424547C (en) 2008-10-08
KR100816971B1 (en) 2008-03-26
WO2004059608A1 (en) 2004-07-15
US7270425B2 (en) 2007-09-18
EP1577872A1 (en) 2005-09-21
JPWO2004059608A1 (en) 2006-04-27

Similar Documents

Publication Publication Date Title
US7270425B2 (en) Projection type video display
KR100951484B1 (en) Projector
US7766490B2 (en) Multi-color primary light generation in a projection system using LEDs
EP3561594B1 (en) Illumination system, projection device and operating method thereof
US7530708B2 (en) Surface emitting light source and projection display device using the same
KR100841532B1 (en) Image display device
US9081268B2 (en) Lighting device and projection-type display apparatus including lighting device
US7207677B2 (en) Image display device and projector
US7237909B2 (en) Optical member, illuminating device, and projection type video display
EP1596247A1 (en) Light source with four or five colours and projector
US20050219478A1 (en) Optical member, illuminating device, and projection type video display
US20050219468A1 (en) Cross dichroic mirror, illuminating device, and projection type video display
US7207679B2 (en) Projection type video display
US20050213345A1 (en) Light source device for illumination
US20110222023A1 (en) Illumination device and projection display device
US7852329B2 (en) Image display apparatus
US20050213344A1 (en) Light source device for illumination
JP4186662B2 (en) Illumination device and projection device
JP2001268588A (en) Illuminator and projective display device
JP2005077814A (en) Illuminator and projection type display device
JP2005121735A (en) Illuminator and projector
JP2006184666A (en) Light source device and image forming apparatus

Legal Events

Date Code Title Description
AS Assignment

Owner name: SANYO ELECTRIC CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ARAI, KAZUHIRO;FUNAZOU, YASUO;REEL/FRAME:017179/0979

Effective date: 20050607

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20150918